0575955 - ÚJF 2024 RIV US eng J - Journal Article
De Gregorio, G. - Knapp, F. - Veselý, Petr - Lo Iudice, N.
Survey of the ⁸He properties within a microscopic multiphonon approach.
Physical Review C. Roč. 108, č. 2 (2023), č. článku 024316. ISSN 2469-9985. E-ISSN 2469-9993
Institutional support: RVO:61389005
Keywords : nuclear response * He-8 * cross section
OECD category: Particles and field physics
Impact factor: 3.2, year: 2023 ; AIS: 0.679, rok: 2023
Method of publishing: Limited access
Result website:
https://doi.org/10.1103/PhysRevC.108.024316DOI: https://doi.org/10.1103/PhysRevC.108.024316

Bulk properties, spectrum, and nuclear response of 8He are investigated within the equation of motion phonon method, which generates an orthonormal basis of n-phonon states (n = 0, 1, 2, 3 ...) whose constituents are Tamm-Dancoff phonons. The basis is free of any contamination induced by the center-of-mass motion, in virtue of a procedure exploiting the singular value decomposition of rectangular matrices. A self-consistent calculation is performed within a space spanned by a basis of n-phonon states up to n = 3 using a potential derived from the chiral effective field theory. The Hartree-Fock single-particle states are obtained from a harmonic-oscillator space including all major shells up to Nmax= 12. The calculation is exact up ton = 2, whereas the three-phonon (n = 3) states are assumed to be composed of noninteracting n = 1 and n = 2 constituent phonons. It yields bulk and spectroscopic observables consistent with the available experimental data and provides an electric dipole response exhibiting distinctive signatures.
Permanent Link: https://hdl.handle.net/11104/0345635